Detectors for imaging in radiation therapy

Abstract

Despite the many advances in patient positioning, dose deliverance as intended remains a difficult practical issue due to a number of complicating factors.Various techniques and methods have been developed over the years for accurate patient positioning.It has long been recognized that the use of the therapy xray beam itself to create portal images can be of significant benefit in assuring correct delivery of the radiation dose. The present study is a brief overview of the detectors incorporated on electronic portal imaging devices imposed by the nature of the application and the physics of the imaging source. It is a summary of the challenges and constraints inherent to portal imaging along with a concise, historical review of the technologies that have been explored and developed. This is followed by a detailed description of a new, high performance, portal imaging technology, which is presently undergoing commercial introduction